酸的强度由其提供质子的能力来衡量,碱的强度由其接受质子的能力来衡量。
最伟大的科学家是那些永不停止学习的人。
The deepest need of man is the need to overcome his separateness, to leave the prison of his aloneness.
没有无聊的主题,只有无聊的作家。
A work of art is a work of art because it's called a work of art.
The only limit to our realization of tomorrow will be our doubts of today.
粮食安全是一个需要地方行动的全球性问题。